55171123 has 4 divisors (see below), whose sum is σ = 63052720. Its totient is φ = 47289528.

The previous prime is 55171121. The next prime is 55171141. The reversal of 55171123 is 32117155.

55171123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55171123 - 2¹ = 55171121 is a prime.

It is a super-3 number, since 3×55171123³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55171121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3940788 + ... + 3940801.

It is an arithmetic number, because the mean of its divisors is an integer number (15763180).

Almost surely, 2^55171123 is an apocalyptic number.

55171123 is a deficient number, since it is larger than the sum of its proper divisors (7881597).

55171123 is an equidigital number, since it uses as much as digits as its factorization.

55171123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7881596.

The product of its digits is 1050, while the sum is 25.

The square root of 55171123 is about 7427.7266374039. The cubic root of 55171123 is about 380.6892453949.

Adding to 55171123 its reverse (32117155), we get a palindrome (87288278).

The spelling of 55171123 in words is "fifty-five million, one hundred seventy-one thousand, one hundred twenty-three".